The quantitation of how much time constitutes short and recent varies by disease and by context, but the core denotation of acute is always qualitatively in contrast with chronic, which denotes long-lasting disease (for example, in acute leukemia and chronic leukemia).
View full size image. Thomas Edison is usually credited with the invention of the light bulb, but the famous American inventor wasn't the only one who contributed to the development of this revolutionary technology.
The next big change in the incandescent bulb came with the invention of the tungsten filament by European inventors in 1904. These new tungsten filament bulbs lasted longer and had a brighter light compared to the carbon filament bulbs. It was a series of small improvements on the ideas of previous inventors that have led to the light bulbs we use in our homes today. 2  Learn more about the history of the incandescent light bulb. 3  Explore the history of fluorescent lights, from the Geissler tube to CFLs. 4  Read about the advancements in LED lights.